eyewitness

eyewitnesseye‧wit‧ness /ˈaɪˌwɪtnəs/ ●○○ noun [countable]SCCsomeone who has seen something such as a crime happen, and is able to describe it afterwardseyewitness account/report/testimonyAccording to eyewitness accounts, soldiers opened fire on the crowd.One eyewitness said he saw her talking to a man in a blue car.